泵的转动部分应加()罩,以避免出现安全故障。

题型:填空题

问题:

泵的转动部分应加()罩,以避免出现安全故障。

考点:氯碱操作工考试氯碱操作工考试题库
题型:填空题
请根据各句上下文的意义,选择正确的单词填入空白处。
musician,    instrument,    loosely,    passer-by,    extra,
reputation,    afterwards,    frog,    unknown,    earn
1. My sister takes an interest in music and she can play some musical _______.
2. Sorry, I don't know where the post office is. I am a _______.
3. As soon as his first novel was published, he earned a _______.
4. _______ have very long back legs for jumping.
5. The old couple _______ their living by collecting and selling used plastic bottles.
6. X is often used to represent an _______ number.
7. After the lunch we parted, so I didn't know what happened to him _______.
8. I get a low salary so sometimes I work _______ to earn more.
9. He fastened the belt _______ around his waist.
10. Beethoven, a great German _______, lived between 1770 and 1827.
题型:填空题

下列运算中,正确的是(  )

A.a2+a2=2a4

B.a2•a3=a6

C.(-3x)3÷(-3x)=9x2

D.(-ab22=-a2b4

题型:填空题

下面有关“两次工业革命”知识结构示意图中①②应分别填上

[ ]

A.瓦特、电力

B.贝尔、电汽

C.瓦特、电气

D.贝尔、电气

题型:填空题

某火灾报警及联动控制系统工程,该工程的主要项目是控制事故照明及疏散标记、事故广播及通信、消防给水、排烟系统和自动灭火系统。该工程火灾探测器采用感温变合型探测器,安装完毕后,对该火灾探测器进行现场测试,并由相关部门对该系统进行了验收。

有关消防工程验收的组织形式叙述中有误的是( )。

A.消防工程验收必须经过由主管部门资质认定的单位来进行实施

B.在工程竣工后,施工安装单位必须委托具备资格的建筑消防设施检测单位进行技术测试,取得建筑消防设施技术测试报告

C.未经验收或者验收不合格的,施工单位也可以交工,建筑物的所有者可以接收使用

D.消防工程施工单位应积极主动配合验收组织工作

题型:填空题

对传动轴系理解正确的是()。Ⅰ.长轴系刚性好,对偏差敏感;Ⅱ.短轴系挠性好对偏差不敏感

A.仅Ⅰ对

B.仅Ⅱ对

C.Ⅰ+Ⅱ

D.Ⅰ,Ⅱ都不对

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